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A series of factors linked to the mechanical system can significantly shift the electrical impedance and the real resonant frequency of the vibrating system.
Introduction The polymeric composites gained substantial acclaim in recent decades and these new materials with particular beneficial properties, are consistently being developed to suit modern applications.
As a result, the quality of these products is adversely affected especially by the reduction of the load-carrying capacity of laminated parts and the overall composites structure.
A series of factors linked to the mechanical system can significantly shift the electrical impedance and the real resonant frequency of the vibrating system with significance consequences for the functional efficiency of the device.
The resonant frequency of the assembly, free of mechanical constrains was 38.994 kHz and it changed at 39.100 kHz when the oscillating system is fixed in the frame.

Politsinsky et. al, Quantum-chemical study of the structure and properties of lead chalcogenides, Fundamental research. 9 (2014) 556-561
Ettmayer, Critical review on the elastic properties of transition metal carbides, nitrides and carbonitrides / // J.
Sirotkin, Multilevel structure and properties of metals and polymers within the unified model of chemical bond, J of Mat.
Malenko, Regression dependencies for evaluating the mechanical properties of steels during solid-solution hardening, Metals. 4 (2015) 64-71
Malenko, Method for evaluating the effect of solid-solution hardening on the mechanical properties of steel in the finished product, Problems of ferrous metallurgy and materials science. 2 (2015). 44-48

(2) Compared with the entire workpiece, the heat-affected region is very small
(3) The material properties of the workpiece are temperature dependent
There are many factors which affect the spark radius, the most important two being material of electrode and the medium.
Material and Element Property.
Though many factors affect the crater size, the energy of a single spark is the most important factor based on empirical equation.

The co-relation between material compositions, microstructure of the sinter pellets and the electrical properties of the sensors are discussed.
It is important to explore the possibility to enhance the ionic conductivity of calcia stabilized zirconia by studying the various parameters affecting it [11].
The following are the photographs showing clearly the micro structural properties.
The same Table 3 shows clearly the affect of sintering at 1500°C for 3 hours.
Further studies will be carried out to study the electrical properties of the pellets to study the feasibility for solid oxide fuel cell applications.

Tests on Properties of Proto-machine-made Sand and Strength of Cement Mortar Affected by Stone Powder Xiaoyan Zhanga, Qiuyan Sunb and Fenglan Lia North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, Henan Province 450011, P.
Based on a series tests, the properties of proto-machine-made sand of gravel such as grain feature, fineness modulus, grading, density, void ratio and MB value as well as the fineness distribution of stone powder were studied, the influences of content of stone powder on these properties of sand and strength of cement mortar were investigated.
The results are introduced in the paper, some of them contribute to explain the special properties of concrete mixed with proto- machine-made sand.
Introduction Based on the former experimental studies, the properties of proto-machine-made sand and the content of stone powder have different influences on the workability of fresh concrete and properties of hardened concrete [1-6].
Therefore, the series tests were carried out to study the inherent properties of proto-machine-made sand and stone powder, and the influences of content of stone powder on properties of sand and strength of cement mortar, the main results are introduced in this paper.

Introduction The track geometry is not perfect, as it is affected by a set of deviations mainly due to the building imperfections, track exploitation, changes in the infrastructure coming from the action of the environment factors or the ground movements [1].
This is approximated via a theoretical curve, in line with ORE B176 [11], considered representative for the average statistic properties of the European railways.
Thus, the corresponding reduction of the value of the response factors and is visible along with the increase of zc.
The results derived from the numerical simulations have pointed out at a number of basic properties of the wheelset vertical vibrations in correlation with the velocity, track damping and its quality.
[9] Suarez, B., Felez, J., Lozano, J.A., Rodriguez, P., Influence of the track quality and of the properties of the wheel–rail rolling contact on vehicle dynamics, Vehicle System Dynamics. 51, 2 (2013) 301-320

More authentic  simulation models include other factors such as;  boundary conditions, filler material and pass sequence in multi-pass welding are complex and require greater computational power and CPU time.
A coupled thermo-mechanical simulation model comprises a moving heat source, material deposition, temperature-dependent material properties, phase-change phenomena defined in terms of latent heat release and shrinkage effects, metal plasticity and elasticity, transient heat transfer and mechanical analysis.
Temperature Dependent Material Properties Model Using material mechanical properties at room temperature, except for the yield stress, gives reasonable predictions for the transient temperature fields, residual stress and distortion [34].
Welding volumetric changes and material thermal properties, mainly enthalpy, which are very important due to significant material phase changes, are incorporated into the FE model [38, 39].
Welding speed and geometric shape of weld groove affect the weld bead and penetration.

But which the fault tree analysis given is some common factors which have influence on oil&gas transmission pipeline failure , and has more difficult in the personality and fuzzy factors in the actual operation .
Also, take the two reasons as tip events and do top-down analysis , it can be found that pipeline leakage is caused by internal and external corrosion and existed defects and pipeline rupture is caused by the third damage , corrosion cracking , incorrect operation , bad material mechanical properties .
But the too general goal layer factors increase the difficulty and the uncertainty of the failure assessment , so it is necessary to analysis the secondary factors of oil&gas transmission pipeline failure .
Calculation example The 18 basic reason events having greater critical importance degree in oil&gas pipeline transmission failure fault tree analysis are listed in sheet 2 , and on this account to do the basic factors of non-linear fuzzy comprehensive assessment , namely : , in which, expresses factor set; and expresses the th factor in factor set.
Thus , the weight sets which mainly affect factors can be obtained according to fault tree analysis , and the comment set can be determined based on experience .

The aim of this study was to evaluate the underlying factor affecting fatigue crack growth rate in the stage II region.
Therefore, fatigue behavior of this alloy has been subjected to numerous studies to improve fatigue material properties [3] [4].
The addition of Zr to Al alloys has exhibited positive effects on microstructure via grain refinement and improvement in the mechanical properties [9].
Thompson, Metallic Materials Properties Development and Standardization (MMPDS) Handbook, NTIS Virginia Scientific Report (2003)
Farrokhpour, Effect of laser shock peening on surface properties and residual stress of Al6061-T6, Optics and Lasers in Engineering Vol. 77 (2016), p. 112

In the present work, mechanical properties of the titanium alloy OCTGs in air and downhole corrosion media are reviewed.
Mechanical Properties of the Titanium Alloy OCTGs in Air.
Mechanical Properties of the titanium Alloy OCTGs in Downhole Corrosion Media.
Chen An et al. [41] investigated the mechanical properties of TC4 titanium alloy drill pipe under corrosive conditions.
The results showed that the tensile properties of TC4 titanium alloy decreased by no more than 10%, the impact properties changed by only 0.33% and the hardness decreased by 3.21% under the NaCl, H2S, CO2 and 205oC coupling environment, indicating that TC4 titanium alloy has excellent corrosion resistance and good comprehensive mechanical properties under corrosive conditions.